dev:codingconventions
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dev:codingconventions [2018/12/19 12:19] tmueller [Use existing infrastructure] |
dev:codingconventions [2018/12/21 08:41] tmueller [Use existing infrastructure] |
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| ===== Use existing infrastructure ===== | ===== Use existing infrastructure ===== | ||
| - | Always prefer [[https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gfortran/Intrinsic-Procedures.html|built-in (intrinsic) functions]] instead of hand-coded routines since they usually include extra numerical checks to avoid intermediate under- or overflow while still performing optimally. Example: | + | Always prefer [[https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gfortran/Intrinsic-Procedures.html|built-in (intrinsic) functions]] instead of hand-coded routines since they usually include extra numerical checks to avoid intermediate under- or overflow while still performing optimally. Examples: |
| - | + | ||
| - | * ''NORM2'' instead of ''%%SQRT(x(1)**2 + x(2)**2 + x(3)**2)%%'' | + | |
| + | * ''NORM2(x)'' instead of ''%%SQRT(x(1)**2 + x(2)**2 + x(3)**2)%%'' | ||
| + | * ''DOT_PRODUCT(x, x)'' instead of ''%%x(1)**2 + x(2)**2 + x(3)**2%%'' | ||
| + | * ''DOT_PRODUCT(x, y)'' instead of ''%%x(1)*y(1) + x(2)*y(2) + x(3)*y(3)%%'' | ||
dev/codingconventions.txt · Last modified: 2018/12/21 08:41 by tmueller
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